state the condition under which work is said to have been done
Answers
Answer:
Explanation:
In Physics, work is done when the object moves through a certain distance in a particular direction after the force had been applied on it.
Work Done = Force x Distance x Cos theta
For work to be done, the force must be applied and must not be zero.
The body on which the force is applied must move in one direction or the other and hence the S must not be zero.
The force must not be applied at 90 degrees angle upon the object as Cos 90 equals zero.
So in a layman’s terms, consider this example. Let’s say you have a wooden trunk in your room. You have to move it out of your room. So you push your trunk and it moves a little in the forward direction. Voila! Work is done because the trunk moved and covers some distance, no matter how small it is. Now lets say you apply force in 90 degrees direction, which means that you just push the trunk into the ground from the above, in such a case, the trunk doesn't move forwards or backwards, hence zero amount of work done.
Hope this helps.
Explanation:
wirk is done said to be completed by the man .